QSL SimplePublish

Diff: main.cpp

Revision:

0:d3f5fdf2e6da

Child:

2:f177b47313ba

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Sep 01 14:53:55 2016 +0000
@@ -0,0 +1,113 @@
+#include "mbed.h"
+#include "dn_qsl_api.h"     // Only really need this include from
+#include "dn_debug.h"       // Included to borrow debug macros
+#include "dn_endianness.h"  // Included to borrow array copying
+#include "dn_time.h"        // Included to borrow sleep function
+
+#define NETID           0       // Factory default value used if zero (1229)
+#define JOINKEY         NULL    // Factory default value used if NULL (44 55 53 54 4E 45 54 57 4F 52 4B 53 52 4F 43 4B)
+#define BANDWIDTH_MS    5000    // Not changed if zero (default base bandwidth given by manager is 9 s)
+#define SRC_PORT        60000   // Default port used if zero (0xf0b8)
+#define DEST_PORT       0       // Default port used if zero (0xf0b8)
+#define DATA_PERIOD_MS  5000    // Should be longer than (or equal to) bandwidth
+
+// We can use debug macros from dn_debug, as stdio defaults to this serial
+Serial serialDebug(SERIAL_TX, SERIAL_RX); 
+// LED1 is the green LED on the NUCLEO-L053R8; might change for other boards
+DigitalOut myled(LED1);
+
+static uint16_t randomWalk(void);
+static void parsePayload(const uint8_t *payload, uint8_t size);
+ 
+int main()
+{
+    uint8_t payload[3];
+    uint8_t inboxBuf[DN_DEFAULT_PAYLOAD_SIZE_LIMIT];
+    uint8_t bytesRead;
+    
+    serialDebug.baud(115200);
+    
+    log_info("Initializing...");
+    dn_qsl_init();
+
+    while(TRUE) {
+        if (dn_qsl_isConnected())
+        {
+            uint16_t val = randomWalk();
+            static uint8_t count = 0;
+            
+            dn_write_uint16_t(payload, val);
+            payload[2] = count;
+            
+            if (dn_qsl_send(payload, sizeof (payload), DEST_PORT))
+            {
+                log_info("Sent message nr %u: %u", count, val);
+                count++;
+            } else
+            {
+                log_info("Send failed");
+            }
+
+            do
+            {
+                bytesRead = dn_qsl_read(inboxBuf);
+                parsePayload(inboxBuf, bytesRead);
+            } while (bytesRead > 0);
+            
+            dn_sleep_ms(DATA_PERIOD_MS);
+        } else
+        {
+            log_info("Connecting...");
+            myled = 0;
+            if (dn_qsl_connect(NETID, JOINKEY, SRC_PORT, BANDWIDTH_MS))
+            {
+                myled = 1;
+                log_info("Connected to network");
+            } else
+            {
+                log_info("Failed to connect");
+            }
+        }
+
+    }
+}
+
+static uint16_t randomWalk(void)
+{
+    static bool first = TRUE;
+    static uint16_t lastValue = 0x7fff; // Start in middle of uint16 range
+    const int powerLevel = 9001;
+    
+    // Seed random number generator on first call
+    if (first)
+    {
+        first = FALSE;
+        srand(dn_time_ms());
+    }
+    
+    // Random walk within +/- powerLevel
+    lastValue += rand() / (RAND_MAX / (2*powerLevel) + 1) - powerLevel;
+    return lastValue;
+}
+
+static void parsePayload(const uint8_t *payload, uint8_t size)
+{
+    uint8_t i;
+    char msg[size + 1];
+    
+    if (size == 0)
+    {
+        // Nothing to parse
+        return;
+    }
+    
+    // Parse bytes individually as well as together as a string
+    log_info("Received downstream payload of %u bytes:", size);
+    for (i = 0; i < size; i++)
+    {
+        msg[i] = payload[i];
+        log_info("\tByte# %03u: %#.2x (%u)", i, payload[i], payload[i]);
+    }
+    msg[size] = '\0';
+    log_info("\tMessage: %s", msg);
+} 
\ No newline at end of file